Filter.



PfMaENTED SEPT. 29, 1903.

E. M, KNIGHT.

FILTER.

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No. 740,365. 2 PATENTED SEPT 29, 1903'.

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FILTER.

APPLICATION FILED MAB; 4, 1903,

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UNITED STATES Patented September 29, 1903.

PATENT OFFICE.

EDWARD M. KNTGHT, yOE BROOKLYN, NEW YoEK, AssieNon OE ONE-HALE To E. H. MARTIN, OE NEW YORK, N. Y.

FILTER.

SPECIFICATION forming part of Letters Patent No. 740,365, dated September 29, 1903.,

Application iiled March 4, 1903. Serial No. 146,121. (No model.)

citizen of the United States, residing at Brooklyn, in the county of Kings and State of New modication to be referred to.

York, have invented new and useful Improve` ments in Filters, of which the following is a' specification.

This invention relates to certain new and useful improvements in filters designed particularly for domestic purposes for removing sedimentary matter from water;` and the invention consists of the parts and the constructions and combinations of parts which I will hereinafter describe and claim.

In the accompanying drawings, forming part of lthis specication, and in which similar letters of reference indicate corresponding parts throughout the several views, Figure 1 represents a perspective view of a filter constructed according to my invention. Fig. 2 is an enlarged sectional view of the same on the line :o so of Fig. 1. Fig. 3- illustrates a Figs. 4, 5, and 6 illustrate several uses of theiilter.

In carrying out my invention l prefer to construct the lter in the form of a relatively narrow disk, as such form is well adapted for the severaluses to which my filter is intended to be put.

The central member A of the filter constitutes, substantially, an open-center frame,and it is made of suitable materialand sufficiently rigid to insure tight joints with the companion parts to be hereinafter referred to. This frame has a centrally-located inwardly-opening circumferential groove a, which forms a chambery for the water which passes through the iilter bed or diaphragm D on its way to the Outlet b, which leads to the filtered-water vessel. At the upper portion of the annular groove is a vent c for the escape of confined air, which if allowed to remain within the frame might tend to make the filter airbound. In addition to the annular groove a. the frame is formed with two outwardly-facing annular channels d, formed between two flanges e e', one, e, surrounding the perimeter -of the frame and the other, e', surrounding rim or annular ring or band f of a foraminous cap B,`which accurately fits the flange and is held Ithereto by frictional contact, said ring or band having an outturned flange g at the inner edge adapted to rest datwiseupon the bottoni of 'the annular groove or channel d.

The foraminous cap B serves as the support for the filter-bed, which bed I prefer to make in the form of a disk or pad of asbestos sub jected to greater pressure at the central portion than at the edges, so as Ito leave a relatively soft pliable edge, as more fully explained in'a companion application, Serialv No. 146,123, filed by me of even date herewith. The pad or'diaphragm D is placed upon the cap or support B and bears such relation .to the same that the soft pliable edge repreagainst the outer wall of the band or ringf asto preclude the possibility of leakage of unfiltered water through the joint thus made. The filter-pad being placed in position over the cap B with its edge extending beyond the plane of the sides of. the ring or bandf, I next secure the pador diaphragm in position by means of an outer ring or band E, which I will hereinafter designate as a setter, as its principal object is 13o-set the pad or diaphragm in its proper and accurate position in the filter. The ring or band may form a member of substantially a foraminous cap of the character of the cap B, through the perforations of which the unfiltered water reaches the asbestos pad ordiaphragm and is filtered in passing through the same, or said band may simply be in the form of an open-center ring E', as shown in Fig. 3, having'an inwardly-turned flange to extend over theangle formed by bending the edge of the pad ordiaphragm into the groove of the frame A. In either case the diameter of the cap or setter E and also the ring E is somewhat greater than 'the cap B, so that when the setter or ring is placed telescopically over the padl or diaphragm its edge l0 forces the edge portion of the pad or diaphragm into the" portion of said edge between the inner wall 12 of the setter or ring and the outer wall 13 of the flange e' of the frame, and thereby makes a water-tight joint at this point.

Vlhen the setter or ring is rst brought into contact with the pad or diaphragm lying upon the support or inne-r cap, its edge depresses the pad into the groove or channel d to make the aforesaid joint, and the edge of the pad will project slightly above the frame and may be then turned into the groove t'o pack the latter by simply running the finger around said edge, thus sealing the joint and completing the filter. It will be understood that both sides of the filter are alike and that each side includes the arrangement of caps, setter, and pad as just described.

The filter as now described may be set into a vessel of unfiltered water, as in Fig. 4, its outlet-tube F being passed through an opening in the bottom of the Vessel and being threaded to receive a nut 15 and washer 16,

' whereby it may be secured lin Vertical position in the unfiltered-Water vessel and the water caused to pass laterally through the pads or diaphragms and be discharged as a filtered product through said outlet F. The discharge may be into a second bucket, pitcher, tank, or other vessel designed to receive the filtered water. Instead of being fixed in position as just described the filter may be simply placed in a tank, bucket, or other vessel and may have its outlet connected to a flexible or other tube 20, in which event the passage of Water through the lter is induced by a siphon action, as illustrated in Fig. 5, or said tube 2O may be held in the mouth and the filter placed in the water of a stream and the water sucked through the filter, as illustrated in Fig. 6.

In either case the passage of the water through the pads or diaphragms causes the latter to take up the suspended impurities and leave the final product a wholesome purified liquid.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. Ina filter the combination of a frame having. two outstanding flanges on its side, a foraminous pad-supporting member fitted to one of said fianges, a fibrous pad or diaphragm of greater diameter than the supporting member and of such diameter that it normally eX- tends across the channel or groove formed between said flanges, and a member including a clamping ring or band telescopically tting the pad or diaphragm and adapted to turn the edge of the latter into said groove or channel and form a water-tight circumferential joint between the adjacent parallel walls of the supporting member and ring or band.

2. ln a filter, an open-center frame having substant-iallyparallel flanges formingbetween them a groove or channel and foraminous plates or supports carried by one ofsaid flanges and fitting said open center, in combination with a fibrous pad or diaphragm upon said support and having its edge normally projecting beyond the edge of said support and over said groove or channel, and a forarninous cap-shaped member adapted to fit over the pad or diaphragm and posi tion the same on the support and turn the normally straight edge of the pad at substantially right angles into said groove or channel and parallel with the adjacent walls of' the cap-shaped member and said plate or support, whereby the pad is substantially stretched and tightened and its edge circumferentially clamped between the opposing surfaces to form a water-tight joint, and a means for frictionally holding the capshaped member in place.

3. In a.filter the combination of an opencenter frame having an outstanding flange surrounding the opening and a second flange spaced from the first-named Hange to form an` intermediate groove or channel; a foraminous cap having an inturned band or ring to fit over said first-named flange; a fibrous pad or diaphragm fitting over the foraminous cap and having such diameter that its edge normally projects beyond the perimeter of the band or ring and over said groove or channel; and an exterior member including a band or ring of greater diameter than the firstnamed cap and adapted to engage the portion of the pad over said groove or channel to set the pad or diaphragm and turn its edge into said groove or channel and clamp the inturned portion between the adjacent concentric walls of the cap and band or ring.

4. In a filter an open-center frame having an internal channel for filtered water, and having two parallel outstanding flanges on each of its sides; foraminous caps each having an inturned flange to fit over and frictionally engage one of the innermost of the first-named flanges; a fibrous filter pad or diaphragm covering the outer face of each of the said caps and havingits edge normally projecting beyond the perimeter thereof; and exterior foraminous caps each having an inwardly-extending circumferential flange to engage the projecting edge of the pad or diaphragm and turn the same into the groove or channel formed between said parallel flanges of the main frame whereby a portion of the edge of' the pad or channel is clamped between the concentric opposing walls ofthe inner and outer caps and a remaining outside portion is packed into the groove between the outer wall of the outside cap and the inner wall of' the outermost flange of the main frame, said frame having a discharge-tube for filtered Water.

5. A filter including an annular Agrooved frame having an open center; inner and cuter telescopically-fitting, foraminous caps, said inner cap frictionally fitted to the open center of the frame; and a fibrous pad or diaphragm between adjacent faces of the caps and circumferentially clamped between the telescopically-fitting portions thereof and having its outer edge packed into a groove or chan- IOO IIO

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nel between the outer Wall of the outer cap and the inner Wall of a flange on the main frame, said main frame having a dischargetube for filtered Water.

6. In a filter, the combination ot an annular open-center frame having substantiallyv parallelinnerandouteroutstanding angesonts opposite sides forming intermediate grooves or channels, said frame having an interior water-passage and a threaded discharge-,tu be whereby it may be fitted to and held vertically in a vessel or tank; inner and outer caps at each side of the frame said outer caps of such diameter that they are adapted to oeeupy central positions in said grooves or chan- In testimony whereof I have hereunto set my hand in presence of two subscribing Witnesses.

EDWARD M. KNIGHT.

Witnesses: n

WALTER J. SKERTEN, GEO. J. B. FRANKLIN. 

